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- /*
- This file is part of GNUnet.
- (C) 2001, 2002, 2004, 2005, 2006, 2007, 2009 Christian Grothoff (and other contributing authors)
- GNUnet is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 3, or (at your
- option) any later version.
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
- */
- /**
- * @file dht/gnunet-dht-get.c
- * @brief search for data in DHT
- * @author Christian Grothoff
- * @author Nathan Evans
- */
- #include "platform.h"
- #include "gnunet_dht_service.h"
- #define LOG(kind,...) GNUNET_log_from (kind, "dht-clients",__VA_ARGS__)
- /**
- * The type of the query
- */
- static unsigned int query_type;
- /**
- * Desired replication level
- */
- static unsigned int replication = 5;
- /**
- * The key for the query
- */
- static char *query_key;
- /**
- * User supplied timeout value
- */
- static struct GNUNET_TIME_Relative timeout_request = { 60000 };
- /**
- * Be verbose
- */
- static int verbose;
- /**
- * Use DHT demultixplex_everywhere
- */
- static int demultixplex_everywhere;
- /**
- * Handle to the DHT
- */
- static struct GNUNET_DHT_Handle *dht_handle;
- /**
- * Global handle of the configuration
- */
- static const struct GNUNET_CONFIGURATION_Handle *cfg;
- /**
- * Handle for the get request
- */
- static struct GNUNET_DHT_GetHandle *get_handle;
- /**
- * Count of results found
- */
- static unsigned int result_count;
- /**
- * Global status value
- */
- static int ret;
- /**
- * Task run to clean up on timeout.
- *
- * @param cls unused
- * @param tc unused
- */
- static void
- cleanup_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
- {
- if (NULL != get_handle)
- {
- GNUNET_DHT_get_stop (get_handle);
- get_handle = NULL;
- }
- if (NULL != dht_handle)
- {
- GNUNET_DHT_disconnect (dht_handle);
- dht_handle = NULL;
- }
- }
- /**
- * Iterator called on each result obtained for a DHT
- * operation that expects a reply
- *
- * @param cls closure
- * @param exp when will this value expire
- * @param key key of the result
- * @param get_path peers on reply path (or NULL if not recorded)
- * @param get_path_length number of entries in get_path
- * @param put_path peers on the PUT path (or NULL if not recorded)
- * @param put_path_length number of entries in get_path
- * @param type type of the result
- * @param size number of bytes in data
- * @param data pointer to the result data
- */
- static void
- get_result_iterator (void *cls, struct GNUNET_TIME_Absolute exp,
- const struct GNUNET_HashCode * key,
- const struct GNUNET_PeerIdentity *get_path,
- unsigned int get_path_length,
- const struct GNUNET_PeerIdentity *put_path,
- unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
- size_t size, const void *data)
- {
- FPRINTF (stdout,
- _("Result %d, type %d:\n%.*s\n"),
- result_count, type,
- (unsigned int) size, (char *) data);
- result_count++;
- }
- /**
- * Main function that will be run by the scheduler.
- *
- * @param cls closure
- * @param args remaining command-line arguments
- * @param cfgfile name of the configuration file used (for saving, can be NULL!)
- * @param c configuration
- */
- static void
- run (void *cls, char *const *args, const char *cfgfile,
- const struct GNUNET_CONFIGURATION_Handle *c)
- {
- struct GNUNET_HashCode key;
- cfg = c;
- if (NULL == query_key)
- {
- FPRINTF (stderr, "%s", _("Must provide key for DHT GET!\n"));
- ret = 1;
- return;
- }
- if (NULL == (dht_handle = GNUNET_DHT_connect (cfg, 1)))
- {
- FPRINTF (stderr, "%s", _("Failed to connect to DHT service!\n"));
- ret = 1;
- return;
- }
- if (query_type == GNUNET_BLOCK_TYPE_ANY) /* Type of data not set */
- query_type = GNUNET_BLOCK_TYPE_TEST;
- GNUNET_CRYPTO_hash (query_key, strlen (query_key), &key);
- if (verbose)
- FPRINTF (stderr, "%s `%s' \n", _("Issueing DHT GET with key"), GNUNET_h2s_full (&key));
- GNUNET_SCHEDULER_add_delayed (timeout_request,
- &cleanup_task, NULL);
- get_handle =
- GNUNET_DHT_get_start (dht_handle, query_type, &key, replication,
- (demultixplex_everywhere) ? GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE : GNUNET_DHT_RO_NONE,
- NULL, 0, &get_result_iterator, NULL);
- }
- /**
- * gnunet-dht-get command line options
- */
- static struct GNUNET_GETOPT_CommandLineOption options[] = {
- {'k', "key", "KEY",
- gettext_noop ("the query key"),
- 1, &GNUNET_GETOPT_set_string, &query_key},
- {'r', "replication", "LEVEL",
- gettext_noop ("how many parallel requests (replicas) to create"),
- 1, &GNUNET_GETOPT_set_uint, &replication},
- {'t', "type", "TYPE",
- gettext_noop ("the type of data to look for"),
- 1, &GNUNET_GETOPT_set_uint, &query_type},
- {'T', "timeout", "TIMEOUT",
- gettext_noop ("how long to execute this query before giving up?"),
- 1, &GNUNET_GETOPT_set_relative_time, &timeout_request},
- {'x', "demultiplex", NULL,
- gettext_noop ("use DHT's demultiplex everywhere option"),
- 0, &GNUNET_GETOPT_set_one, &demultixplex_everywhere},
- {'V', "verbose", NULL,
- gettext_noop ("be verbose (print progress information)"),
- 0, &GNUNET_GETOPT_set_one, &verbose},
- GNUNET_GETOPT_OPTION_END
- };
- /**
- * Entry point for gnunet-dht-get
- *
- * @param argc number of arguments from the command line
- * @param argv command line arguments
- * @return 0 ok, 1 on error
- */
- int
- main (int argc, char *const *argv)
- {
- if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
- return 2;
- return (GNUNET_OK ==
- GNUNET_PROGRAM_run (argc, argv, "gnunet-dht-get",
- gettext_noop
- ("Issue a GET request to the GNUnet DHT, prints results."),
- options, &run, NULL)) ? ret : 1;
- }
- /* end of gnunet-dht-get.c */
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